PT-2021-15559 · Flatcore · Flatcore

Published 2021-01-15 · Updated 2021-01-22 · CVE-2021-23838

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: flatCore versions prior to 2.0.0 build 139

Description: A reflected XSS issue was identified in the media filter HTTP request body parameter for the acp interface. This parameter accepts malicious client-side script without proper input sanitization, allowing a malicious user to steal cookies from a victim user and perform a session-hijacking attack, potentially leading to unauthorized access to the site.

Recommendations: For versions prior to 2.0.0 build 139, update to a version 2.0.0 build 139 or later to resolve the issue. As a temporary workaround, consider restricting access to the media filter parameter in the acp interface to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-23838

Affected Products

Flatcore

References · 8

• 🔥 http://packetstormsecurity.com/files/160936/flatCore-CMS-XSS-File-Disclosure-SQL-Injection.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-23838 · Security Note
• https://osv.dev/vulnerability/CVE-2021-23838 · Vendor Advisory
• https://github.com/flatCore/flatCore-CMS · Note
• https://sec-consult.com/vulnerability-lab · Note
• https://t.me/cvenotify/8565 · Telegram Post
• https://t.me/cvenotify/8586 · Telegram Post
• https://t.me/cibsecurity/22197 · Telegram Post